<template>
  <!-- 获取子组件:ref/cildren -->
  <div class="wrapper"
       ref="wrappers">
    <div>
      <slot></slot>
    </div>
  </div>
</template>

<script>
import BScroll from 'better-scroll'

export default {
  name: 'Scroll',
  props: {
    probeType: {
      type: Number,
      default: 0
    },
    pullUpLoad: {
      type: Boolean,
      default: false
    }
  },
  data() {
    return {
      scroll: null
    };
  },
  created() {

  },
  mounted() {
    // 1.创建BScroll对象
    this.scroll = new BScroll(this.$refs.wrappers, {
      probeType: this.probeType,
      pullUpLoad: this.pullUpLoad,
      observeDOM: true,
      click: true,
      useTransition: false
    })

    // 2.监听滚动的位置
    this.scroll.on('scroll', position => {
      this.$emit('scroll', position)
    })


    // 3.监听上拉事件
    if (this.pullUpLoad) {
      this.scroll.on('pullingUp', () => {
        this.$emit('pullingUp')
      })
    }

  },
  methods: {
    scrollTo(x, y, time = 500) {
      this.scroll.scrollTo(x, y, time)
    },
    finishPullUp() {
      this.scroll.finishPullUp()
    },

    // 刷新BS
    refresh() {
      // console.log('刷新');
      this.scroll.refresh()
    }
  }
};
</script>

<style scoped>
</style>
